Breeding waterfowl use of level-ditch habitat in western Canada : S.J. Rushforth and R.M. Kaminski. final report /
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TextPublication details: Winnipeg, MB : 1982. Ducks Unlimited Canada,Description: v, 58 p. : ill. , map ; 28 cmOnline resources: Abstract: An evaluation of breeding waterfowl use of Ducks Unlimited level ditch projects situated throughout Alberta, Saskatchewan and Manitoba was conducted in 1980 and 1981. Blue-winged teal (Anas discors) and mallard (Anas platyrhynchos) were the most frequently encountered species in all provinces. Indicated breeding pair densities were higher in Alberta than in Saskatchewan and Manitoba. Pair densities pooled over projects and years translated into estimated costs per duck of $8.00 for Alberta parkland and forest and $12.15 for Manitoba parkland and Saskatchewan and Manitoba forest biomes. Pair densities increased between 1980 and 1981 in all provinces, mainly as a result of increased blue-winged teal densities. Blue-winged teal nested on spoils more frequently than did other species. Nest densities were higher in Alberta than in Manitoba and increased between 1980 and 1981. The increase was related to increased pair densities and improved spoil-bank nesting cover. Nest success was lower
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Includes bibliographical references (p. 27-32).
An evaluation of breeding waterfowl use of Ducks Unlimited level ditch projects situated throughout Alberta, Saskatchewan and Manitoba was conducted in 1980 and 1981. Blue-winged teal (Anas discors) and mallard (Anas platyrhynchos) were the most frequently encountered species in all provinces. Indicated breeding pair densities were higher in Alberta than in Saskatchewan and Manitoba. Pair densities pooled over projects and years translated into estimated costs per duck of $8.00 for Alberta parkland and forest and $12.15 for Manitoba parkland and Saskatchewan and Manitoba forest biomes. Pair densities increased between 1980 and 1981 in all provinces, mainly as a result of increased blue-winged teal densities. Blue-winged teal nested on spoils more frequently than did other species. Nest densities were higher in Alberta than in Manitoba and increased between 1980 and 1981. The increase was related to increased pair densities and improved spoil-bank nesting cover. Nest success was lower